The strains extracted pepsin from the gastric mucosa of pigs, sheep or cattle. Containing the protease activity of not less than 3800 units per 1g. 
 The lack of pepsin-induced disease: the oversupply of food protein foods commonly used in the lack of indigestion, the convalescence digestive dysfunction and chronic atrophic gastritis, gastric cancer, pernicious anemia caused by pepsin. 
 【Characters】 This product is white or light yellow powder; smelly mildew lost; wet primer; aqueous solution of acid reaction. 
 [Identification] to take this product in aqueous solution add tannic acid, gallic acid, or the majority of heavy metal salts solution, and precipitation.